American Standard 80 Furnace Manual

The American Standard 80 Furnace is a high-efficiency gas furnace with 80% AFUE rating, designed for reliable home heating. This single-stage furnace features durable heat exchanger construction, electronic ignition, variable-speed blower motor, and comprehensive safety controls. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Durable aluminized steel heat exchanger, electronic hot surface ignition, multi-speed direct drive blower, integrated control board, pressure switches, flame sensor, and limit switches.

Installation Requirements

Proper installation is critical for safe and efficient operation. Follow all local codes and manufacturer guidelines.

1. Location: Install in dry, clean area with adequate combustion air and service clearance.
2. Venting: Use approved PVC or metal venting materials per local codes.
3. Gas Supply: Connect to proper gas line with sediment trap and shut-off valve.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Ductwork: Ensure proper sizing and sealing of supply and return ducts.

WARNING! Installation must be performed by qualified HVAC technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup and configuration by qualified technician.

1. Gas pressure adjustment: Set manifold pressure to specifications on rating plate.
2. Blower speed settings: Adjust cooling and heating speeds per application requirements.
3. Thermostat configuration: Connect compatible thermostat and configure settings.
4. System check: Verify proper ignition sequence, flame detection, and safety controls.
5. Combustion analysis: Check CO levels and combustion efficiency.

CAUTION! Only qualified technicians should perform initial startup and adjustment procedures.

Technical Specifications

• AFUE Rating: 80% Annual Fuel Utilization Efficiency
• Input Capacity: 40,000 to 120,000 BTU/H (model dependent)
• Gas Type: Natural Gas (LP conversion kit available)
• Electrical: 120V AC, 60Hz, 1.5 Amps maximum
• Static Pressure: 0.1 to 0.9 inches water column
• Venting: Category I vertical or horizontal venting
• Sound Rating: Ultra-quiet operation design
• Dimensions: Varies by model (check specific model data)
• Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Integrated control board manages all furnace operations with LED status indicator.

Control Board Features: Self-diagnostic capability, status LED, blower control, ignition sequence management, safety lockout.

Thermostat Settings: Heat/Off/Cool mode selection, temperature setpoint, fan auto/on control. Blower Settings: Heating and cooling speed taps for airflow adjustment. Limit Settings: Manual reset high limit protection. Pressure Switch: Verifies inducer operation before ignition.

Venting and Ductwork

Proper venting is essential for safe operation and efficiency.

1. Vent Materials: Use approved PVC, CPVC, or metal venting as required.
2. Vent Configuration: Follow manufacturer guidelines for vertical or horizontal runs.
3. Combustion Air: Ensure adequate fresh air supply for proper combustion.
4. Duct Sizing: Properly sized ducts for optimal airflow and efficiency.
5. Filter Installation: Install clean air filter before operation.

Tip: Regular inspection of venting system prevents blockages and ensures safety.

Operating Instructions

Normal operation through thermostat control.

1. Set thermostat to desired temperature and HEAT mode.
2. Furnace initiates call for heat sequence: inducer motor starts, pressure switch verifies, hot surface igniter glows, gas valve opens, burner ignition occurs.
3. Flame sensor confirms ignition, main blower activates after heat exchanger warm-up.
4. When thermostat satisfied, gas valve closes, blower continues for post-purge cooling.
5. For continuous fan operation, set thermostat fan switch to ON position.

WARNING! Never operate furnace without proper air filter installed.

Maintenance Procedures

Regular maintenance ensures optimal performance and longevity.

1. Monthly: Check and replace air filter as needed.
2. Annual Professional Service: Clean burners, heat exchanger, and blower assembly.
3. Inspect vent system for obstructions or damage.
4. Check gas connections for leaks with bubble solution.
5. Verify safety controls and limit switches operation.
6. Lubricate blower motor if required (check specific model).

CAUTION! Turn off electrical power and gas supply before performing any maintenance.

Safety Features

Multiple safety systems protect against hazardous conditions.

Regulatory Information

UL listed and ANSI certified for safety and performance. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for residential gas furnaces. For technical support or warranty service, contact American Standard customer service at 1-800-4-AMERICAN or visit www.americanstandardair.com.

Troubleshooting Guide

Reset Procedure: Turn thermostat to OFF, turn off power for 30 seconds, restore power, set thermostat to HEAT.

Service: 1-800-4-AMERICAN; www.americanstandardair.com